Senior Software Engineer ($160K - $220K + Equity) at Theseus

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Job Title: Senior Software Engineer

Salary: $160K - $220K + Equity

Company Description: Theseus - YC S24 drone autonomy startup

Job Description:
You will build the critical operator-facing software layer for visual positioning systems that allow drones to navigate without GPS. Working across React, TypeScript, and Python, you will develop mission planning tools and data workflows used in contested environments. This role bridges the gap between advanced autonomy and real-world operational mission execution.

Location: San Francisco, USA

Why this role is remarkable:

• Work on mission-critical technology already deployed by the DoD, SOCOM, and NATO to solve GPS-jamming challenges in global conflict zones.

• Join a high-velocity YC S24 team that raised $4.3M from First Round Capital and moved from hackathon to military exercises in under a year.

• Exceptional autonomy in a lean 6-person team where your code directly impacts autonomous aircraft performance in the most demanding environments on Earth.

What you will do:

• Design and ship production-grade frontend applications and backend services for mission planning, map generation, and real-time telemetry analysis.

• Build and maintain robust internal APIs that interface between edge-deployed autonomous systems and cloud-based operational infrastructure.

• Partner directly with field and autonomy teams to translate ambiguous operator needs into reliable, user-facing product features for the Vozilla platform.

The ideal candidate:

• 3-6 years of experience shipping production software at high-caliber startups or engineering organizations with a focus on reliability.

• Full-stack proficiency in TypeScript, React, and Python, with a strong background in designing data-intensive applications and database schemas.

• A pragmatic builder who thrives in high-stakes environments; experience in robotics, defense, or geospatial systems is a significant advantage.

Who are Jack & Jill?
Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.
And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate.

Next steps
Step 1. Visit our website.
Step 2. Click 'Talk to Jack'.
Step 3. Talk to Jack so he can understand your experience and ambitions.
Step 4. Jack will make sure Jill (the AI agent working for the company) considers you for this role.
Step 5. If Jill thinks you're a great fit and her client wants to meet you, they will make the introduction.
Step 6. If not, Jack will find you excellent alternatives. All for free.

We never post fake jobs
This isn't a trick. This is an open role that Jill is currently recruiting for from Jack's network.
Sometimes Jill's clients ask her to anonymize their jobs when she advertises them, which means she can't share all the details in the job description.
We appreciate this can make them look a bit suspect, but there isn't much we can do about it.
Give Jack a spin! You could land this role. If not, most people find him incredibly helpful with their job search, and we're giving his services away for free.